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Firefox will not show on screen after windows critical update occured for Windows 10.

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This update of 9/22/16 has caused both Firefox and Skype to show in the tray. I can see the minimized screen but when clicked to open nothing happens

This update of 9/22/16 has caused both Firefox and Skype to show in the tray. I can see the minimized screen but when clicked to open nothing happens

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What is your Firefox?

You may have corrupt xulstore.json or Localstore.rdf file.

Close Firefox. Open your file browser to this hidden location:

  • Mac: *~/Library/Application Support/Firefox/
  • Linux: *~/.mozilla/firefox/
  • Windows: %AppData%\Mozilla\Firefox\
  • *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\

Locate the above files. Then rename or delete them. Restart Firefox.